Time-domain finite-difference beam propagation method

Masoudi, Husain M.; Alsunaidi, M. A.; Arnold, Jörg

doi:10.1109/68.789715

Cited by 17 publications

(17 citation statements)

References 6 publications

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“…The pulse break up phenomenon due to intermodal dispersion was first observed and explored qualitatively by Chiang (2005Chiang ( , 1997, using the approximate traditional coupled-mode theory (Marcuse 1991;Snyder and Love 1983), based on simplified one dimensional coupled Time-Domain (TD) parabolic equations. It is to be observed at this point that TD parabolic equation showed severe limitation in modeling short pulses due to the paraxial approximation involved (Masoudi et al 1999(Masoudi et al , 2001. As the initial pulse duration decreases the spatiotemporal coupling effect becomes more significant for the proper propagation of ultra short pulses.…”

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confidence: 94%

Analysis of ultra short pulse propagation in optical directional coupler structures

Masoudi

2009

Opt Quant Electron

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We employ an efficient time-domain beam propagation technique to study the effect of the propagation of ultra short pulse duration on the behavior of directional coupler operation. The technique used is based on higher order non-paraxial formulation that takes into account the spatiotemporal coupling effect which is crucial for the proper propagation of ultra short optical pulses. In this work the characterization of pulse spread and broad frequency content interactions of short pulse propagation have been analyzed. We validate in this rigorous analysis that the intermodal dispersion of the structure changes the behavior of the well known operation and breaks up the pulse during propagation which gives rise to distortion.

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confidence: 94%

Analysis of ultra short pulse propagation in optical directional coupler structures

Masoudi

2009

Opt Quant Electron

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“…On the other hand, multilayer waveguides are important in design of biosensors and filters [11,12]. Equation of wave for plannar waveguides has been solved by several methods [13][14][15][16][17], and method of Lines (MOL) is one of them. MOL due to high accuracy, less computational time and smaller memory requirement compared to other methods which have been applied to multilayer waveguides, is important.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite Multilayer Structure for Broadband MIR Negative Refractive Index

Khosravi

Rostami

Rostami³

et al. 2015

J. Lightwave Technol.

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 Abstract-The main purpose of this work is designing a structure with broadband Negative Refractive Index (NRI) in the wavelengths range of 3-5 µm using multilayer structures. In the proposed structure actually nano composite thin films are used to make multilayer waveguide to show effective NRI. In the composite structure, core-shell nanoparticles including metallic core and a polymeric shell with high refractive index are used. Here, it is shown that by increasing the number of composite layers the bandwidth for NRI can be increased. Therefore, based on simulation results, in eight-layer waveguide, NRI is available in complete 3 to 5 µm MIR band. In this regard, also, the effect of filling factor (in each thin film layer) on NRI is studied. Index Terms-Metamaterial, Negative Refractive Index and Multilayer Waveguide 0733-8724 (c)

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“…One way to model long optical devices of TD interaction is to use the BPM principle of one way propagation. A few years back we proposed two efficient paraxial TD-BPM techniques for that purpose [12,13]. The techniques were very useful for short optical pulse durations, but failed to model ultra short pulses because of the paraxial approximation involved.…”

Section: Introductionmentioning

confidence: 99%

“…The method uses Pade recurrence approximation after the negligence of a few operator derivatives. In this work we developed a new nonparaxial time-domain BPM based on the same principle of the paraxial TD-BPM given in [12,13]. First, the TD wave equation was written as a one-way propagational operator and then the recently developed rational complex coefficient approximation of the well known Pade approximant has been used to break the paraxial difficulty [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A noveltime‐domain technique for nonparaxial ultra short optical pulses

Masoudi

2007

Micro & Optical Tech Letters

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A novel nonparaxial technique based on Pade approximant for modeling ultra short optical pulses has been discussed and verified. The characterization of the technique shows excellent performance in terms of accuracy, efficiency, and stability where the traditional paraxial time‐domain beam propagation method failed to achieve. The new method is very useful and efficient for modeling long optical pulse interaction when compared to the classical finite‐difference time‐domain. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2481–2486, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22796

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Time-domain finite-difference beam propagation method

Cited by 17 publications

References 6 publications

Analysis of ultra short pulse propagation in optical directional coupler structures

Analysis of ultra short pulse propagation in optical directional coupler structures

Nanocomposite Multilayer Structure for Broadband MIR Negative Refractive Index

A noveltime‐domain technique for nonparaxial ultra short optical pulses

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